Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 732 insertions, 0 deletions

diff --git a/app/widgets/gimpcontainertreeview-dnd.c b/app/widgets/gimpcontainertreeview-dnd.c
new file mode 100644
index 0000000..7a0878f
--- /dev/null
+++ b/app/widgets/gimpcontainertreeview-dnd.c
@@ -0,0 +1,732 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcontainertreeview-dnd.c
+ * Copyright (C) 2003-2009 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "widgets-types.h"
+
+#include "core/gimpcontainer.h"
+#include "core/gimpviewable.h"
+
+#include "gimpcontainertreestore.h"
+#include "gimpcontainertreeview.h"
+#include "gimpcontainertreeview-dnd.h"
+#include "gimpcontainertreeview-private.h"
+#include "gimpcontainerview.h"
+#include "gimpdnd.h"
+#include "gimpviewrenderer.h"
+#include "gimpselectiondata.h"
+
+
+static gboolean
+gimp_container_tree_view_drop_status (GimpContainerTreeView    *tree_view,
+                                      GdkDragContext           *context,
+                                      gint                      x,
+                                      gint                      y,
+                                      guint                     time,
+                                      GtkTreePath             **return_path,
+                                      GdkAtom                  *return_atom,
+                                      GimpDndType              *return_src_type,
+                                      GimpViewable            **return_src,
+                                      GimpViewable            **return_dest,
+                                      GtkTreeViewDropPosition  *return_pos)
+{
+  GimpViewable            *src_viewable  = NULL;
+  GimpViewable            *dest_viewable = NULL;
+  GtkTreePath             *drop_path     = NULL;
+  GtkTargetList           *target_list;
+  GdkAtom                  target_atom;
+  GimpDndType              src_type;
+  GtkTreeViewDropPosition  drop_pos      = GTK_TREE_VIEW_DROP_BEFORE;
+  GdkDragAction            drag_action   = 0;
+
+  if (! gimp_container_view_get_container (GIMP_CONTAINER_VIEW (tree_view)) ||
+      ! gimp_container_view_get_reorderable (GIMP_CONTAINER_VIEW (tree_view)))
+    goto drop_impossible;
+
+  target_list = gtk_drag_dest_get_target_list (GTK_WIDGET (tree_view->view));
+  target_atom = gtk_drag_dest_find_target (GTK_WIDGET (tree_view->view),
+                                           context, target_list);
+  if (! gtk_target_list_find (target_list, target_atom, &src_type))
+    goto drop_impossible;
+
+  switch (src_type)
+    {
+    case GIMP_DND_TYPE_URI_LIST:
+    case GIMP_DND_TYPE_TEXT_PLAIN:
+    case GIMP_DND_TYPE_NETSCAPE_URL:
+    case GIMP_DND_TYPE_COLOR:
+    case GIMP_DND_TYPE_SVG:
+    case GIMP_DND_TYPE_SVG_XML:
+    case GIMP_DND_TYPE_COMPONENT:
+    case GIMP_DND_TYPE_PIXBUF:
+      break;
+
+    default:
+      {
+        GtkWidget *src_widget = gtk_drag_get_source_widget (context);
+
+        if (! src_widget)
+          goto drop_impossible;
+
+        src_viewable = gimp_dnd_get_drag_data (src_widget);
+
+        if (! GIMP_IS_VIEWABLE (src_viewable))
+          goto drop_impossible;
+      }
+      break;
+    }
+
+  if (gtk_tree_view_get_path_at_pos (tree_view->view, x, y,
+                                     &drop_path, NULL, NULL, NULL))
+    {
+      GimpViewRenderer *renderer;
+      GtkTreeIter       iter;
+      GdkRectangle      cell_area;
+
+      gtk_tree_model_get_iter (tree_view->model, &iter, drop_path);
+
+      gtk_tree_model_get (tree_view->model, &iter,
+                          GIMP_CONTAINER_TREE_STORE_COLUMN_RENDERER, &renderer,
+                          -1);
+
+      dest_viewable = renderer->viewable;
+
+      g_object_unref (renderer);
+
+      gtk_tree_view_get_cell_area (tree_view->view, drop_path, NULL, &cell_area);
+
+      if (gimp_viewable_get_children (dest_viewable))
+        {
+          if (gtk_tree_view_row_expanded (tree_view->view, drop_path))
+            {
+              if (y >= (cell_area.y + cell_area.height / 2))
+                drop_pos = GTK_TREE_VIEW_DROP_INTO_OR_AFTER;
+              else
+                drop_pos = GTK_TREE_VIEW_DROP_BEFORE;
+            }
+          else
+            {
+              if (y >= (cell_area.y + 2 * (cell_area.height / 3)))
+                drop_pos = GTK_TREE_VIEW_DROP_AFTER;
+              else if (y <= (cell_area.y + cell_area.height / 3))
+                drop_pos = GTK_TREE_VIEW_DROP_BEFORE;
+              else
+                drop_pos = GTK_TREE_VIEW_DROP_INTO_OR_AFTER;
+            }
+        }
+      else
+        {
+          if (y >= (cell_area.y + cell_area.height / 2))
+            drop_pos = GTK_TREE_VIEW_DROP_AFTER;
+          else
+            drop_pos = GTK_TREE_VIEW_DROP_BEFORE;
+        }
+    }
+  else
+    {
+      GtkTreeIter iter;
+      gint        n_children;
+
+      n_children = gtk_tree_model_iter_n_children (tree_view->model, NULL);
+
+      if (n_children > 0 &&
+          gtk_tree_model_iter_nth_child (tree_view->model, &iter,
+                                         NULL, n_children - 1))
+        {
+          GimpViewRenderer *renderer;
+
+          gtk_tree_model_get (tree_view->model, &iter,
+                              GIMP_CONTAINER_TREE_STORE_COLUMN_RENDERER,
+                              &renderer,
+                              -1);
+
+          drop_path     = gtk_tree_model_get_path (tree_view->model, &iter);
+          dest_viewable = renderer->viewable;
+          drop_pos      = GTK_TREE_VIEW_DROP_AFTER;
+
+          g_object_unref (renderer);
+        }
+    }
+
+  if (dest_viewable || tree_view->priv->dnd_drop_to_empty)
+    {
+      if (GIMP_CONTAINER_TREE_VIEW_GET_CLASS (tree_view)->drop_possible (tree_view,
+                                                                         src_type,
+                                                                         src_viewable,
+                                                                         dest_viewable,
+                                                                         drop_path,
+                                                                         drop_pos,
+                                                                         &drop_pos,
+                                                                         &drag_action))
+        {
+          gdk_drag_status (context, drag_action, time);
+
+          if (return_path)
+            *return_path = drop_path;
+          else
+            gtk_tree_path_free (drop_path);
+
+          if (return_atom)
+            *return_atom = target_atom;
+
+          if (return_src)
+            *return_src = src_viewable;
+
+          if (return_dest)
+            *return_dest = dest_viewable;
+
+          if (return_pos)
+            *return_pos = drop_pos;
+
+          return TRUE;
+        }
+
+      gtk_tree_path_free (drop_path);
+    }
+
+ drop_impossible:
+
+  gdk_drag_status (context, 0, time);
+
+  return FALSE;
+}
+
+#define SCROLL_DISTANCE 30
+#define SCROLL_STEP     10
+#define SCROLL_INTERVAL  5
+/* #define SCROLL_DEBUG 1 */
+
+static gboolean
+gimp_container_tree_view_scroll_timeout (gpointer data)
+{
+  GimpContainerTreeView *tree_view = GIMP_CONTAINER_TREE_VIEW (data);
+  GtkAdjustment         *adj;
+  gdouble                new_value;
+
+  adj = gtk_tree_view_get_vadjustment (GTK_TREE_VIEW (tree_view->view));
+
+#ifdef SCROLL_DEBUG
+  g_print ("scroll_timeout: scrolling by %d\n", SCROLL_STEP);
+#endif
+
+  if (tree_view->priv->scroll_dir == GDK_SCROLL_UP)
+    new_value = gtk_adjustment_get_value (adj) - SCROLL_STEP;
+  else
+    new_value = gtk_adjustment_get_value (adj) + SCROLL_STEP;
+
+  new_value = CLAMP (new_value,
+                     gtk_adjustment_get_lower (adj),
+                     gtk_adjustment_get_upper (adj) -
+                     gtk_adjustment_get_page_size (adj));
+
+  gtk_adjustment_set_value (adj, new_value);
+
+  if (tree_view->priv->scroll_timeout_id)
+    {
+      g_source_remove (tree_view->priv->scroll_timeout_id);
+
+      tree_view->priv->scroll_timeout_id =
+        g_timeout_add (tree_view->priv->scroll_timeout_interval,
+                       gimp_container_tree_view_scroll_timeout,
+                       tree_view);
+    }
+
+  return FALSE;
+}
+
+void
+gimp_container_tree_view_drag_failed (GtkWidget             *widget,
+                                      GdkDragContext        *context,
+                                      GtkDragResult          result,
+                                      GimpContainerTreeView *tree_view)
+{
+  if (tree_view->priv->scroll_timeout_id)
+    {
+      g_source_remove (tree_view->priv->scroll_timeout_id);
+      tree_view->priv->scroll_timeout_id = 0;
+    }
+
+  gtk_tree_view_set_drag_dest_row (tree_view->view, NULL, 0);
+}
+
+void
+gimp_container_tree_view_drag_leave (GtkWidget             *widget,
+                                     GdkDragContext        *context,
+                                     guint                  time,
+                                     GimpContainerTreeView *tree_view)
+{
+  if (tree_view->priv->scroll_timeout_id)
+    {
+      g_source_remove (tree_view->priv->scroll_timeout_id);
+      tree_view->priv->scroll_timeout_id = 0;
+    }
+
+  gtk_tree_view_set_drag_dest_row (tree_view->view, NULL, 0);
+}
+
+gboolean
+gimp_container_tree_view_drag_motion (GtkWidget             *widget,
+                                      GdkDragContext        *context,
+                                      gint                   x,
+                                      gint                   y,
+                                      guint                  time,
+                                      GimpContainerTreeView *tree_view)
+{
+  GtkAllocation            allocation;
+  GtkTreePath             *drop_path;
+  GtkTreeViewDropPosition  drop_pos;
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  if (y < SCROLL_DISTANCE || y > (allocation.height - SCROLL_DISTANCE))
+    {
+      gint distance;
+
+      if (y < SCROLL_DISTANCE)
+        {
+          tree_view->priv->scroll_dir = GDK_SCROLL_UP;
+          distance = MIN (-y, -1);
+        }
+      else
+        {
+          tree_view->priv->scroll_dir = GDK_SCROLL_DOWN;
+          distance = MAX (allocation.height - y, 1);
+        }
+
+      tree_view->priv->scroll_timeout_interval = SCROLL_INTERVAL * ABS (distance);
+
+#ifdef SCROLL_DEBUG
+      g_print ("drag_motion: scroll_distance = %d  scroll_interval = %d\n",
+               distance, tree_view->priv->scroll_timeout_interval);
+#endif
+
+      if (! tree_view->priv->scroll_timeout_id)
+        tree_view->priv->scroll_timeout_id =
+          g_timeout_add (tree_view->priv->scroll_timeout_interval,
+                         gimp_container_tree_view_scroll_timeout,
+                         tree_view);
+    }
+  else if (tree_view->priv->scroll_timeout_id)
+    {
+      g_source_remove (tree_view->priv->scroll_timeout_id);
+      tree_view->priv->scroll_timeout_id = 0;
+    }
+
+  if (gimp_container_tree_view_drop_status (tree_view,
+                                            context, x, y, time,
+                                            &drop_path, NULL, NULL, NULL, NULL,
+                                            &drop_pos))
+    {
+      gtk_tree_view_set_drag_dest_row (tree_view->view, drop_path, drop_pos);
+      gtk_tree_path_free (drop_path);
+    }
+  else
+    {
+      gtk_tree_view_set_drag_dest_row (tree_view->view, NULL, 0);
+    }
+
+  /*  always return TRUE so drag_leave() is called  */
+  return TRUE;
+}
+
+gboolean
+gimp_container_tree_view_drag_drop (GtkWidget             *widget,
+                                    GdkDragContext        *context,
+                                    gint                   x,
+                                    gint                   y,
+                                    guint                  time,
+                                    GimpContainerTreeView *tree_view)
+{
+  GimpDndType              src_type;
+  GimpViewable            *src_viewable;
+  GimpViewable            *dest_viewable;
+  GdkAtom                  target;
+  GtkTreeViewDropPosition  drop_pos;
+
+  if (tree_view->priv->scroll_timeout_id)
+    {
+      g_source_remove (tree_view->priv->scroll_timeout_id);
+      tree_view->priv->scroll_timeout_id = 0;
+    }
+
+  if (gimp_container_tree_view_drop_status (tree_view,
+                                            context, x, y, time,
+                                            NULL, &target, &src_type,
+                                            &src_viewable,
+                                            &dest_viewable, &drop_pos))
+    {
+      GimpContainerTreeViewClass *tree_view_class;
+
+      tree_view_class = GIMP_CONTAINER_TREE_VIEW_GET_CLASS (tree_view);
+
+      if (src_viewable)
+        {
+          gboolean success = TRUE;
+
+          /* XXX: Make GimpContainerTreeViewClass::drop_viewable()
+           * return success?
+           */
+          tree_view_class->drop_viewable (tree_view, src_viewable,
+                                          dest_viewable, drop_pos);
+
+          gtk_drag_finish (context, success, FALSE, time);
+        }
+      else
+        {
+          gtk_drag_get_data (widget, context, target, time);
+        }
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+void
+gimp_container_tree_view_drag_data_received (GtkWidget             *widget,
+                                             GdkDragContext        *context,
+                                             gint                   x,
+                                             gint                   y,
+                                             GtkSelectionData      *selection_data,
+                                             guint                  info,
+                                             guint                  time,
+                                             GimpContainerTreeView *tree_view)
+{
+  GimpViewable            *dest_viewable;
+  GtkTreeViewDropPosition  drop_pos;
+  gboolean                 success = FALSE;
+
+  if (gimp_container_tree_view_drop_status (tree_view,
+                                            context, x, y, time,
+                                            NULL, NULL, NULL, NULL,
+                                            &dest_viewable, &drop_pos))
+    {
+      GimpContainerTreeViewClass *tree_view_class;
+
+      tree_view_class = GIMP_CONTAINER_TREE_VIEW_GET_CLASS (tree_view);
+
+      switch (info)
+        {
+        case GIMP_DND_TYPE_URI_LIST:
+        case GIMP_DND_TYPE_TEXT_PLAIN:
+        case GIMP_DND_TYPE_NETSCAPE_URL:
+          if (tree_view_class->drop_uri_list)
+            {
+              GList *uri_list;
+
+              uri_list = gimp_selection_data_get_uri_list (selection_data);
+
+              if (uri_list)
+                {
+                  tree_view_class->drop_uri_list (tree_view, uri_list,
+                                                  dest_viewable, drop_pos);
+
+                  g_list_free_full (uri_list, (GDestroyNotify) g_free);
+
+                  success = TRUE;
+                }
+            }
+          break;
+
+        case GIMP_DND_TYPE_COLOR:
+          if (tree_view_class->drop_color)
+            {
+              GimpRGB color;
+
+              if (gimp_selection_data_get_color (selection_data, &color))
+                {
+                  tree_view_class->drop_color (tree_view, &color,
+                                               dest_viewable, drop_pos);
+
+                  success = TRUE;
+                }
+            }
+          break;
+
+        case GIMP_DND_TYPE_SVG:
+        case GIMP_DND_TYPE_SVG_XML:
+          if (tree_view_class->drop_svg)
+            {
+              const guchar *stream;
+              gsize         stream_length;
+
+              stream = gimp_selection_data_get_stream (selection_data,
+                                                       &stream_length);
+
+              if (stream)
+                {
+                  tree_view_class->drop_svg (tree_view,
+                                             (const gchar *) stream,
+                                             stream_length,
+                                             dest_viewable, drop_pos);
+
+                  success = TRUE;
+                }
+            }
+          break;
+
+        case GIMP_DND_TYPE_COMPONENT:
+          if (tree_view_class->drop_component)
+            {
+              GimpImage       *image = NULL;
+              GimpChannelType  component;
+
+              if (tree_view->dnd_gimp)
+                image = gimp_selection_data_get_component (selection_data,
+                                                           tree_view->dnd_gimp,
+                                                           &component);
+
+              if (image)
+                {
+                  tree_view_class->drop_component (tree_view,
+                                                   image, component,
+                                                   dest_viewable, drop_pos);
+
+                  success = TRUE;
+                }
+            }
+          break;
+
+        case GIMP_DND_TYPE_PIXBUF:
+          if (tree_view_class->drop_pixbuf)
+            {
+              GdkPixbuf *pixbuf;
+
+              pixbuf = gtk_selection_data_get_pixbuf (selection_data);
+
+              if (pixbuf)
+                {
+                  tree_view_class->drop_pixbuf (tree_view,
+                                                pixbuf,
+                                                dest_viewable, drop_pos);
+                  g_object_unref (pixbuf);
+
+                  success = TRUE;
+                }
+            }
+          break;
+
+        default:
+          break;
+        }
+    }
+
+  gtk_drag_finish (context, success, FALSE, time);
+}
+
+gboolean
+gimp_container_tree_view_real_drop_possible (GimpContainerTreeView   *tree_view,
+                                             GimpDndType              src_type,
+                                             GimpViewable            *src_viewable,
+                                             GimpViewable            *dest_viewable,
+                                             GtkTreePath             *drop_path,
+                                             GtkTreeViewDropPosition  drop_pos,
+                                             GtkTreeViewDropPosition *return_drop_pos,
+                                             GdkDragAction           *return_drag_action)
+{
+  GimpContainerView *view           = GIMP_CONTAINER_VIEW (tree_view);
+  GimpContainer     *container      = gimp_container_view_get_container (view);
+  GimpContainer     *src_container  = NULL;
+  GimpContainer     *dest_container = NULL;
+  gint               src_index      = -1;
+  gint               dest_index     = -1;
+
+  if (src_viewable)
+    {
+      GimpViewable *parent = gimp_viewable_get_parent (src_viewable);
+
+      if (parent)
+        src_container = gimp_viewable_get_children (parent);
+      else if (gimp_container_have (container, GIMP_OBJECT (src_viewable)))
+        src_container = container;
+
+      if (src_container)
+        src_index = gimp_container_get_child_index (src_container,
+                                                    GIMP_OBJECT (src_viewable));
+    }
+
+  if (dest_viewable)
+    {
+      GimpViewable *parent;
+
+      /*  dropping on the lower third of a group item drops into that group  */
+      if (drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER &&
+          gimp_viewable_get_children (dest_viewable))
+        {
+          parent = dest_viewable;
+        }
+      else
+        {
+          parent = gimp_viewable_get_parent (dest_viewable);
+        }
+
+      if (parent)
+        dest_container = gimp_viewable_get_children (parent);
+      else if (gimp_container_have (container, GIMP_OBJECT (dest_viewable)))
+        dest_container = container;
+
+      if (parent == dest_viewable)
+        dest_index = 0;
+      else
+        dest_index = gimp_container_get_child_index (dest_container,
+                                                     GIMP_OBJECT (dest_viewable));
+    }
+
+  if (src_viewable && g_type_is_a (G_TYPE_FROM_INSTANCE (src_viewable),
+                                   gimp_container_get_children_type (container)))
+    {
+      if (src_viewable == dest_viewable)
+        return FALSE;
+
+      if (src_index == -1 || dest_index == -1)
+        return FALSE;
+
+      /*  don't allow dropping a parent node onto one of its descendants
+       */
+      if (gimp_viewable_is_ancestor (src_viewable, dest_viewable))
+        return FALSE;
+    }
+
+  if (src_container == dest_container)
+    {
+      if (drop_pos == GTK_TREE_VIEW_DROP_BEFORE)
+        {
+          if (dest_index == (src_index + 1))
+            return FALSE;
+        }
+      else if (drop_pos == GTK_TREE_VIEW_DROP_AFTER)
+        {
+          if (dest_index == (src_index - 1))
+            return FALSE;
+        }
+    }
+
+  if (return_drop_pos)
+    *return_drop_pos = drop_pos;
+
+  if (return_drag_action)
+    {
+      if (src_viewable && g_type_is_a (G_TYPE_FROM_INSTANCE (src_viewable),
+                                       gimp_container_get_children_type (container)))
+        *return_drag_action = GDK_ACTION_MOVE;
+      else
+        *return_drag_action = GDK_ACTION_COPY;
+    }
+
+  return TRUE;
+}
+
+void
+gimp_container_tree_view_real_drop_viewable (GimpContainerTreeView   *tree_view,
+                                             GimpViewable            *src_viewable,
+                                             GimpViewable            *dest_viewable,
+                                             GtkTreeViewDropPosition  drop_pos)
+{
+  GimpContainerView *view       = GIMP_CONTAINER_VIEW (tree_view);
+  GimpContainer     *src_container;
+  GimpContainer     *dest_container;
+  gint               dest_index = 0;
+
+  if (gimp_viewable_get_parent (src_viewable))
+    {
+      src_container = gimp_viewable_get_children (
+        gimp_viewable_get_parent (src_viewable));
+    }
+  else
+    {
+      src_container = gimp_container_view_get_container (view);
+    }
+
+  if ((drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER   ||
+       drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE) &&
+      gimp_viewable_get_children (dest_viewable))
+    {
+      dest_container = gimp_viewable_get_children (dest_viewable);
+      dest_viewable  = NULL;
+      drop_pos       = GTK_TREE_VIEW_DROP_BEFORE;
+    }
+  else if (gimp_viewable_get_parent (dest_viewable))
+    {
+      dest_container = gimp_viewable_get_children (
+        gimp_viewable_get_parent (dest_viewable));
+    }
+  else
+    {
+      dest_container = gimp_container_view_get_container (view);
+    }
+
+  if (dest_viewable)
+    {
+      dest_index = gimp_container_get_child_index (dest_container,
+                                                   GIMP_OBJECT (dest_viewable));
+    }
+
+  if (src_container == dest_container)
+    {
+      gint src_index;
+
+      src_index  = gimp_container_get_child_index (src_container,
+                                                   GIMP_OBJECT (src_viewable));
+
+      switch (drop_pos)
+        {
+        case GTK_TREE_VIEW_DROP_AFTER:
+        case GTK_TREE_VIEW_DROP_INTO_OR_AFTER:
+          if (src_index > dest_index)
+            dest_index++;
+          break;
+
+        case GTK_TREE_VIEW_DROP_BEFORE:
+        case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE:
+          if (src_index < dest_index)
+            dest_index--;
+          break;
+        }
+
+      gimp_container_reorder (src_container,
+                              GIMP_OBJECT (src_viewable), dest_index);
+    }
+  else
+    {
+      switch (drop_pos)
+        {
+        case GTK_TREE_VIEW_DROP_AFTER:
+        case GTK_TREE_VIEW_DROP_INTO_OR_AFTER:
+          dest_index++;
+          break;
+
+        case GTK_TREE_VIEW_DROP_BEFORE:
+        case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE:
+          break;
+        }
+
+      g_object_ref (src_viewable);
+
+      gimp_container_remove (src_container,  GIMP_OBJECT (src_viewable));
+      gimp_container_insert (dest_container, GIMP_OBJECT (src_viewable),
+                             dest_index);
+
+      g_object_unref (src_viewable);
+    }
+}